”aira” Offers Pneumatic Actuator Operated The butterfly or wafer damper can be a stack damper where sealing or tight shut – off is not all-important. This type is used as an isolating damper for flue – gas scrubbers. The butterfly damper is lightweight , simple , quickly actuated and often comparatively low in cost. In process work , oval shapes adapt to t hat shape of duct . Occasionally , a double – disc butterfly appears resembling a circular two-bladed louver damper. The drive for a butterfly damper is also simple , needing only 90° of motion . The torque requirement can vary widely over damper life , if corrosion and thermal effects are severe.
Specification & Standard
| Specification | Details |
|---|---|
| Design & Manufacturer | API 609 CATEGORY A / IS : 13095 / BSEN 593 |
| Valve Face To Face Dimension | ASME B 16.10, Other F To F Available On Request |
| Inspection & Testing | API 598 / BSEN 12266-1 |
| Seat Leakage Class | 5% Leakage of Full Flow (Class 1 Available On Request) |
| End Connection | Wafer Type |
| Top Flange Drilling | ASME B16.5 / 16.47 Series A Class 150 |
| Certification | Design CE Approved, SIL3 Approved, POD |
| Size Range | 1.1 / 2″ To 20″ ( 40 MM To 500 MM ) |
| Temperature Range | -50°C To 300°C For Soft Seated Valves. Contact Works For Special Requirement |
| Pressure Class | 150# |
| Leakage Class | 5% Leakage Of Full Flow |
| Body Material | CAST IRON, S.G IRON, M.S |
| Disc Material | SS 304, SS 316, M.S. |
| Seat Material | SS 304, SS 316, M To M |
